/Engine/Source/Runtime/Engine/Classes/Animation/CustomAttributesRuntime.h
Blend custom attribute values from N set of inputs (ptr-values)
static void BlendAttributes ( const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [UE::Anim::FStackAttributeContainer](API\Runtime\Engine\Animation\FStackAttributeContainer) *const > SourceAttributes, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const float > SourceWeights, [UE::Anim::FStackAttributeContainer](API\Runtime\Engine\Animation\FStackAttributeContainer) & OutAttributes )